diff --git a/autqzs1rvq.js b/autqzs1rvq.js
index dadb019..54c3a09 100644
--- a/autqzs1rvq.js
+++ b/autqzs1rvq.js
@@ -51,7 +51,7 @@
         this.score = 0;
         this.lives = 10;
 
-		if (this.enemies.length !== 0) {
+		if (this.enemies instanceof Array && this.enemies.length !== 0) {
 			this.enemies.map(
 				function(enemy) {
 					this.kill(enemy);